CURRENTLY THE NOAA/NSSL MULTI-RADAR/MULTI-SENSOR (MRMS) SYSTEM INCORPORATES DATA FROM AUTOMATED RAIN GAUGE NETWORKS AND ALL WSR-88D RADARS UPGRADED WITH DUAL-POLARIZATION TECHNOLOGY IN THE CONTERMINOUS U.S. (CONUS). THE MRMS SYSTEM IS RUNNING OPERATIONALLY AT NCEP SINCE FALL 2015 AND THESE AUTOMATED PRECIPITATION ESTIMATES ARE TRANSMITTED TO NATIONAL WEATHER SERVICE FORECASTERS IN REAL TIME. MRMS HAS BEEN USED FOR NUMEROUS VALIDATION AND ALGORITHMS APPLICATIONS AND ENHANCEMENT BY THE PRECIPITATION MEASUREMENT MISSIONS COMMUNITY AND PROVIDED INSIGHT INTO THE PRECIPITATION PROPERTIES (RATE TYPES MICROPHYSICS) AT FINE SCALE. GIVEN THIS HIGHLY SUCCESSFUL SYSTEM BASED PRIMARILY ON GROUND RADARS AND THE MORE-THAN-DECADELONG HIGH-RESOLUTION SPACEBORNE PRECIPITATION MEASURING TECHNIQUES WE PROPOSE TO ACCESS NASA S RESEARCH PRECIPITATION PRODUCTS FROM THE TROPICAL RAINFALL MEASURING MISSION (TRMM) AND GLOBAL PRECIPITATION MEASUREMENT (GPM) MISSION FOR ROBUST COMPARISON TO GROUND RADAR PRODUCTS AND EVALUATION. THIS DETAILED QUANTIFICATION OF ERROR CHARACTERISTICS OF TRMM AND CURRENT GPM PRECIPITATION PRODUCTS CAN HELP TO PROVIDE A BASELINE OF PERFORMANCE FOR THE GLOBAL PRECIPITATION MEASUREMENT (GPM) MISSION. THE OVERARCHING GOAL OF THIS RESEARCH PROJECT IS TO LEVERAGE THE HERETOFORE INDEPENDENT MRMS EFFORT IN ORDER TO PROVIDE A USEFUL OPERATIONAL TOOL FOR GPM CONUS-WIDE EVALUATION OF RAINFALL AND SNOWFALL RATES (A MEASUREMENT PARAMETER FUNDAMENTAL TO THE GPM MISSION). THE WORK IS DESIGNED TO FURTHER CEMENT THE LINKS BETWEEN SPACE AND GROUND-BASED PRECIPITATION REMOTE SENSING SO THAT SYNERGISTIC PHYSICAL VALIDATION AND DEVELOPMENT OF MULTISENSOR ALGORITHMS CAN PROCEED.